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Turbosmart Race Port Blow-Off Valves are designed for use on large-capacity turbocharger systems and high-horsepower engines. These are the largest and highest-flowing BOVs in the Turbosmart lineup. Featuring a unique collar design, small size, and lightweight construction. 46 percent lighter and 25 percent smaller than the product it replaces, Turbosmart Race Port Blow-Off Valves provide greater performance through faster turbo spool-up from idle, along with reduced turbo lag between gears. Turbosmart Race Port BOV's are ideal for circuit and drag vehicles and trucks.